Answer:
I think the opposite is loose
Explanation:
Because responsible is being able to be trusted to do a task right? So loose would be the opposite since if you're loose(crazy,out of control,ect) you wouldn't be trusted as being responsible
B uses correct punctuation
c - counterclaim.
The purpose of a counterclaim to allow the writer to express a viewpoint that opposes a stated opinion on a topic.
It cannot be topic because topic is literally in the sentence itself.
It cannot be claim because "a stated opinion on a topic" would be your claim for something.
To oppose a claim, you would want to use a counterclaim, something to counter (oppose) the original claim.
Many Islams were discriminated, since a group of Islamic people attacked America on 9/11.